Davit.



C. HOYER.

DAVIT.

APPLICATION FILED MAR. 18. I918.

Patented Aug. 6, 1918.

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r ,p i NIZLED;EH311TES PATENT OFFICE; I nEwroRK, mi, assrelvonrosmr gmo u wonirs, i jqvqoar oea'rnn, or roman. 1;, A ooeronarxonosnnw YoR l Duffel 1,274,550, 5' sp x e n Patented Au .'6,1 91s.

": A p plication iiledMarch 18, 191s, semi No. 222,988.

any .one of the several rows of life boats Q ll@ mfi i $9 6 5 o "Beit known that I, CHRISTIAN Horr'm'ga from the chocks and swing that boat outranged on the boat deck, in -more rows than qngm davit, is so constructed that it {can move inboardf'as far as it c'anfmove, 011tboard, and; it'is'therefore able to plck 'llp te ns-ed" with davi'ts soconnected'together th'at ib'oth would be automatically operated together.

subject oftheKing of Denmarlgand a resiward overthe side of the ship. This ability dent offboroughof Queens, NewYorkoity, of my davit'to handle several lines or rows 5 in the county of New York and State Of offlife boatsis believed to be new and not s New York, have inventedf'certain newand :possessed by vany other davit; it is a very useful "Improvementsfin "Davits, of which valuablefeature of my construction'since it the following is a'specificatioiix' f enables me-to'reduce the number of davits T5 Thisifiv'entionrelates to improvements on theshipfand yet operate; the'large num- 10 iirdavitsf L f 3 5 ber oflifebo'ats necessaryj This is a very Especially thelinvention"relates'todavits desirable'featur e in the equipment of ships,

which are pivoted to swing outwardso far since the davits are always in the way and asto permit boat to be lowered freely to I are obstructions to the loading. and unloadthe water, and on even-keelwithoutstriking ing of the vessel, and it'is therefore desir- 15 "againstthe side of theshipevenwhen the ,able todiminish thenumber of davits as ship is held down toth'e side Yo'pp'ositei'to much as possible. fBut, onfthe other hand,

that onw'hich-thelife'boat isbeing'lowered. "there must be davits enough to handle all .Q'The davits are alsof 'constfiu'ctedand 'a'rfthe life-boats, and the numberof life-boats ,ian arsa that'themaii who-is operating must therefore" be great. VConsequently by 2O jeach fdavitlshall havejannnobstructed View thefability of my davittojs'wing freely inof the davi-tiin allits positio1 1s, s'0 as 'to imboard and outboard, so that a single 'pair of Inediately discern the need of any further davits can handle anumber ofrows of boats, (movementor' cessation"of themovement of -I"accoin.plish thef'important resultfof adethe 'davit,flwithout havingf his-view ob- "quatel'y" launching the life boats,'a d" yet do"- 25 jstructed byany parts of thedavit structure Ti'ngso with a m'uchsmallernumberfof davitjs or'lifeboat. I I than is now required, 1;: A

'Andthe invention also" aims to provide Referring" to the drawings which accomsueh' 'aiconstruction as shall" increase the 'p'aiiy' the specification to aid the description, strength of the davit and the secure holding "Figure 1 is 'a' front ele'vation'sh'owing a davit 30 "of the boat in the desired 'position while beabout at'its' extreme outward position, Fig.

, 'ing launched; 'To this end', -thef'da'vitsare 2-inajside elevation, and Fig. 3*isa plan of constructed so tli'atthe' strains"ofthe weights *the same;- w k 1 V I r of th'e'lifeboat and the load of passengers T111; will of'cou'rse be understood that there whichalinount to several'tons, are= distrib- "wil l be two similardavits, one foreach end 35 *u te'd to"atleast threepointsfnot in line with got the boat, and I-p'refer that eaohjdavit "eachothen whereby there is no greatbrushshallbe separatelyfland independentlyopel ing strain on-any one point. Thedavits are "ated by a man or -'1ne'n' stationed at that 1, ,also so constructedthatthe gears are proidavit. I indeedprefel' thatthe'proper'oper- 0 tecte'd fromtheweather bysuitable housing, ation ofthe two da'vits, so as to lower both 40 and that the davits shall not beweakened 'iends of the life boat onevenkeelywhich by slots orgroovesfor connecting with the is indispensable to the safe lowering of the arm by whichthe-davits are operated. 'l oaded' boat, 'shall'b e accomplished by the Onegofthe chief advantages of my con- 'two'mengortwo groups of men, one ateach struction isalso that the daVit cansWing "davit, and clearly observing the motion of 45 inboard as far asit can swing outboard, and "theb'oat as it is-being lowered, to'any sothis enables the davit to pick 'up' several called automatic operation of the two davits boats; If-fori example there are many boats [in unison with each other; although, of:

onthe'ship sd i liatthey r'equireto be ar- '-course the features of this invention might 1 :-But now assuming that there aretwo bracket 6 of the frame B, which supports the davit operating gear wheel C.

Said dav1t A is thus hinged at a point not at the center of the said gear C;"andconsequcntly the arm or plate D, \vh ich connects said davit A with said gear C, must have a motionlengthwise of said davit as said davit moves toaud fro and toinsurethe possibility of such movement, without resorting to any slots or grooves in said davit, by which the strength oft-he davit would be much diminished, I provide a box IE, or cross-head, which incloses, or practically incloses a part of the said davit. Said davit A, or so much thereof as is suflicient to allow of the necessary travel of said box as the same moves to and. fro, is made with parallel sides, so

thatsaid box E has a true fit at every part thereof. ,Said arm D is securely fastened by bolts or rivets to said gear wheel C which may be only a part or segment of a complete wheel; and said box Eis pivotally connected with said arm D by a Stud 7, which passes through a suitable hole in arm D and is headed on the inside of said arm D. (See Fig.2.) I may also employ friction rolls to diminish the friction ofsaid box IE, asit plays to and fro on the said davit A.

The position of said frame B is such that the plane of the frame is a right angle to the length of the ship, and to the end ofthe boat both as it swings fromthe davit and is normally supported in its cho'cks. The plane, therefore, ofthe gear C is also perpendicular to the length of the ship orlifeboat in its normal position, and this isalso the plane of the length of the worm H, which engages said gear C. Finally, the axle of the bevel gear J, which engages the bevel gear I of saidworm H, is perpendicular to said frame B, and the crank K, which is operated by the man at the davit is placed near that end of the said frame B which is not obstructed by the davit, or by the boat hanging therefrom; and so that the man can have a clear unobstructed view of the boat in all its'position's, and can clearly see and decide upon what-further movementof his davit mechanism shall be given to properly lower the boat on an even keel. This 1' conthe bearings of said bevel gear J and its axle,

as well as said crank, will be supported on a bracket M secured to sald frame B.

In order to protect the said gear G from at at least three points as it moves to and fro,

namely, from the pivot a, second, at the connection of the box E, with said davit A, or of'the' stud of said box E witlrthe arin D,

and third, the,,co n nection of the worm H with the ge ar C The only position in which the davit has notthe said threepoints of support, is that when it is exactly vertical; and thenthere is no tendenc yto break or strain the said davit. Ifiut in everyoth er position the said davit will have the ,three jpoints of support.

1 lNow having described any improvements I claim as rny invention I, I

t 1. In a davit operating mechanism, the combination of a ships davit adapted tO swing inboard and outboardand pivoted to a stationary. base, and mechanism for swinging said davit characterized by a worm wheel and meansto rotate said worm wheel and an arm on said worm wheel movablyengag- .ingasliding member on said davit.

2. The combination of a davit adaptedto swing inboard and outboard, a davit operating worm -gear and meansto rotate said worm. gear, an arm on said worm gear'and a box adaptedto slide on said davit and engaged. by saidarmL 3. In a davitapparatus, the combination of a davit, worm gearfor'operating said davit, and saiddavitbeing pivoted eccentrically with respect to the' center of said worm gear, an arm .on said worm gear, a slidable piece ,from. said davit to said arm and connected w1th said arm eccentr callyto the ce'nter'of said worm gear, and means for op erating saidj worm gear 'e'ccentrically connected with said worm gear.

4. In davit operating mechanism, the combination of a davit hinged at its lower end to swing outboard, a box: longitudinally movable on said davit, a davit actuating gear 'wheel and a pivotal connection of said gear wheel with'said box, and means operated by' a davit operatorfor actuating said 'davit gear wheel. I ;5.- In davit .operatmg mechanism, the combination of, a davit adapted to swing in.- board and outboardso far that sa1d dav1t can. p ck up an innerboat and swing the same clea'r outboard to be lowered, a worm gear adapted to operate said davit throughout said swinging motion, an arm on said worm gear, and a boxadapted to shde on said davit and engaging said arm.

. 6. Indavit operating mechanism, the combination of a davit adapted to swing inboard and outboard so farthat said davit can pick up an inner boat and swing the Signed at New York city, in the county same clear outboard to be lowered, a worm of New York, and State of New York, this gear adapted to operate said davit through- 14th day of March, A. D. 1918.

out said swinging motion, an arm .on said a worm gear, and a'box adapted to slide on Witnesses: said davit and engaging said arm, and hous- 'L. L. SAWMAN, ing to protect said gear from the weather. a THOMAS J RILEY.

CHRISTIAN HOYER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

